Unlike capacitive and inductive sensors, our sensor measures the height to the top surface of a glass bed, not the distance to a backing plate.
A red LED indicates when the head is at or below target height.

PanelDue
is a full-colour touch-sensitive graphical control panel for 3D printers. It is compatible with printer electronics running
RepRapFirmware and now Repetier. Support is being added to Smoothieware.